Electric discharge device



March LGPP Q ELECTRIC DISCHARGE DEVICE;

Filed Feb. 4, 1941 MVmll/Illl lhvehzbr: 6097211261 30);

Patented Mar. 24, 1942 ELECTRIC DISCHARGE DEVICE Edmund Liipp, Berlin,Germany, assignor to C. Lorenz Aktiengesellschaft, Berlin-Tempelhof,Germany, a company Application February 4, 1941, Serial No. 377,311 InGermany January 20, 1940 4 Claims.

This invention relates to the means by which an electron tube and itssocket are interconnected, and is more particularly concerned withshort-wave tubes of the kind having their bulb made of pressed glass.

One feature of the invention is that the bottom of such glass bulb isused as a stop for the socket, the accuracy, in the manufacture ofpressed glass bulbs being such that the tolerances concerned are notgreater than $0.1 millimeter, as has been proved by numerous tests.

In the drawing, Fig. 1 is a partially diagrammatic sectional Viewillustrating one embodiment of the invention, Fig. 2 shows a section online 2-2, Fig. 1, while Fig. 3 is a sectional view representing a slightmodification of the socket shown in Figs. 1 and 2.

I denotes the socket while 2 indicates the electron tube whose bulb ismade of pressed glass. The bottom A of the bulb has a re-entrant fiatpart in which the lead-in conductors 3 are mounted. These conductors areto engage with contact springs which form part of the socket. Forsimplicity these springs are not illustrated.

Bottom A is shaped to grip over a central annular projection or upturnededge B of the socket l and thus serves as a stop intended to comeagainst the edge B as counter-stop.

Bottom A is formed with lugs C for notches D provided in the edge 13.The lugs enter the angular position with respect to each other, that is,the position necessary for the conductors 3 engaging with the propercontact springs of the socket.

The parts A, B thus constitute a sort of coarse guide, while C, Dconstitute the fine guide.

The socket shown in Fig. 3 has a circumferential projection or upturnededge E that serves as an additional guide for the electron tube.

What is claimed is:

1. An electric discharge device comprising an electron tube and a sockettherefor, this tube having a bottom arranged to act as a stop adapted tocome against a stop forming part of the socket, the stop of the socketbeing a central annular projection thereof while the said bottom isshaped to grip over this projection.

2. A discharge device according to claim 1, wherein the stop of thesocket is a central annular projection thereof and which comprises guidemeans to insure a determinate angular position of the electron tube withrespect to the socket.

3. A discharge device according to claim 1, wherein the stop of thesocket is a central annular projection thereof and which comprisesnotches and lugs of such projectionand said bottom to insure adeterminate angular position of electron tube and socket.

4. A discharge device according to claim 1, wherein the socket has acircumferential projection as an additional guide for the electron tube.

EDMUND L6PP.

